Elgin Factory Balance Staff for 16s Grade 755 (Ultra 421) Pocket Watch movement

Elgin Factory Balance Staff for 16s Grade 755 movement, Reflll # 755-264, new in envelope. This Grade 755 is an Ultra caliber 421 Antichoc based French pocket watch movement. Have personally never seen one. See images for further details. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item